Bottom board for foundry-flasks.



PATENTED JULY 21, 1908.

J. L. BUTLER. BOTTOM BOARD FOR FOUNDRY PLASKS.

. APPLICATION FILED APR. 2, 1908.

Wit" eases JAMES L. BUTLER, or ALLIANCE, OHIO. f

BO TTOM BOARD FOR FOUNDRY-FLASKS.

Specification of Letters Patent.

Patentedfl'uly 21, 1908.

Application filed April 2, 1908. Serial No. 424,763.

To all' whom it may concern:

Be it known that I, JAMES L. BUTLER, a citizen of the United States, residing at Alliance/in the county of Stark and State of Ohio, have invented certain new and useful Improvements in Bottom Boards for Foundry-Flasks; and I do hereby declare that the following is a full, clear, and exact descri tion of the same, reference being had to t e accompanying drawing, making a part of this specification, and to the numerals and figures of reference marked thereon.

The object of the present invention is to. provide a bottom board for foundry flasks that is practically indestructible, and at the same time so formed that it will be light and easy to move about.

Figure 1 is a perspective view. Fig. 2 is an end view. Fig. 3 is a sectional view taken on line 33, Fig. 2.

Similar numerals of reference indicate corresponding parts in all the figures of the drawing.

In the accompanying drawing, 1 represents the su porting bars, which are formed of a suitab e length to support the board proper. The bars I are preferably formed channel shape, and as shown, they are provided with the top and outward extended flanges, 2, and the lower outward extended flanges, 3. It is well understood that bottom boards of this class must be rigid in or der to prevent any springing and owing to the fact that they are to be handled from time to time it is of importance that they be light. Heretofore bottom boards of this class have been formed of Wood, but owing to the use to which they are ut they are easily destroyed or injured by burnin and warping. By my peculiar arrangement am enabled to produce a board that is indestructible and one that will not be injured from use.

For the purpose of providing rigidity the corrugated metal sheet 4 is provided, which corrugated metal sheet is provided with the extended or flange portions 5. Upon the upward extended corrugations of the corrugated sheet'4 is placed the bottom sheet 6, the upper surface of which is designed to receive and hold a foundry flask in the same manner as the common and ordinary wood board support.

The sheet 6 is folded over and upon the upper outward extended flanges 2, to'which flanges the sheet 6 is securely attached by suitable rivets 7. The ends of the board or sheet 6 are folded over and under the extended'portions 5 of the corrugated sheet 4 and securely connected thereto by means of suitable rivets 8, by which arrangement the sides and ends of the bottom board are securely connected to the supporting bars, 1, v

and the corrugated sheet respectively.

For the purpose of preventing any s ringing movement the plain and smooth s eet 6 is riveted or otherwise connected to the upward extended corrugations of the corrugated sheet 4, thereby securely connecting the corrugated sheet 4, and the plain sheet 6 together to produce a light and rigid structure well adapted for the pu ose designed.

Having fully descrlbe my invention what I claim as new and desire to secure by Letters Patent, is

1. As an im roved article of manufacture, a bottom boar for foundry flasks, consisting of supporting bars, a corrugated sheet located between the supporting bars, a sheet located upon the upper corrugations of the corrugated sheet and the sheet resting upon the corrugations of the corrugated sheet secured to the supporting bars, substantially as and for the purpose specified.

2. As an im roved article of manufacture, a bottom boar for foundry flasks, consisting of en porting bars, a corrugated sheet provide with extended non-corrugated portions, a plain sheet resting u on the up er corrugations of the corrugate sheet, sa1 plain sheet folded upon and secured to the extended noncorrugated portions of the corrugated sheet, substantially as and for the purpose specified.

3. As an Improved article of manufacture, a bottom board for foundry flasks, consisting of su porting bars, said su porting bars provide with outward exten ed flanges, a corrugated sheet provided with non-corrugated extended ortions, a plain sheet resting upon the tops of the upper corrugations of the corrugated sheet and the plain sheet folded upon and secured to the outward extended flanges of the supporting bars and the non-corrugatedportions of the corru ated sheet respectively, substantially. as and or the purpose specified.

4. As an improved article of manufacture,

a bottom board for foundry flasks, consist-.

corrugated sheet provided with non-corrugated extended portions, a plainsheet resting upon the tops of the up er corrugations of the corrugated sheet an the plain sheet 2 v seam folded u on and secured to the outward ex- In testimony that I claim the above, I

tended anges of the supporting bars and the have hereunto subscribed my name in the non-corrugated ortions of the corrugated presence of two Witnesses. sheet, res ecti'vei and the plain sheet se- JAMES L. BUTLER. cured to t e upward extended corrugations Witnesses: of the corrugated sheet, substantially as and JAMES WM. BUTLER,

for the purpose specified. E. P. SEEIDEL. 

